Pirastro Evah Pirazzi Gold 4/4 Cello String Set - Medium Gauge 4/4 Cello String Set - Medium (mittel) Gauge A String: High-Tensile Steel Core - Precision Chrome Steel Flat Wire Winding - Ball End D String: High-Tensile Steel Core - Precision Chrome Steel Flat Wire Winding - Ball End G String: Steel Rope Core - Tungsten Winding - Ball End C String: Steel Rope Core - Tungsten Winding - Ball End